I spend a lot of time on a mountain bike and began to experience pain and numbness in my feet after riding for a while. I had a sports Doc check things out and he determined that a couple pairs of my Italian dress shoes were too narrow. When your feet are compressed this causes a number of problems. I replaced my shoes and the doc gave me a couple pads for my cycling shoes. Problems went away very quickly.

More questions before possible solutions. Have you tried walking on the treadmill barefoot to see if the symptoms are replicated? Do you walk with the treadmill on an incline? Do your symptoms occur at the same time frame after initiating exercise. What is your medical history? Age? Does this only happen when on the treadmill?

About 15-20mins into any aerobic machine workout, my feet tend to go numb, esp my right foot for some reason. I have to pick up one foot at a time and shake them out for 20-30 seconds.

What does that mean? Too tight on top? Bad arch position in the shoe? It happens with pretty much every running/cross trainer shoe I've had in the last 10 years.

I've had the same problem. The bottom of my left foot would tingle then go numb after 30 minutes of playing soccer. Went to the doctor and he said it should get better with time as I had just started exercising again. Since then, I haven't had that problem, but instead, found out I have a moderate meniscus issue in my left knee

Like everyone else has said, try different shoes and def. switch up the incline. I used to have bad shin splints and when I would walk on say speed of 4.0 and a 0 incline my shins would tense up and my feet would hurt. If you were to slow down the speed to say 3.6 and bump it up to 5.0 incline you'd likely change the pressure on your feet and shins and it may go away. This worked for me, and is only my opinion but it def worked.